Submillimeter Observations of Protostellar Cores

Details Submillimeter Observations of Protostellar Cores Submillimeter Observations of Protostellar Cores

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..ses.kc002y&link_type=abstract

American Physical Society, 67th Annual Meeting of the APS Southeastern Section November 2 - 4, 2000 Mississippi State University

Astronomy and Astrophysics

Astronomy

Scientific paper

In the past, studies of the earliest stages of star formation have revealed three separate classes of developing stars (Class I, II and III). These classifications were based on the spectral energy distributions (SEDs) obtained, primarily, from Infrared Astronomical Satellite (IRAS) observations. However, more recent work has shown that there exists an earlier stage, Class 0, with SEDs that peak at wavelengths greater than 100 microns. Now, it is thought that the earliest stages of star formation occur in dense cores with no internal luminosity source (pre-protostellar cores or Class -1). Since submillimeter dust emission in these cores is optically thin, we can probe the density structure of these cores by observing at longer wavelengths (i.e. far-infrared and submillimeter). We present submillimeter continuum observations of a sample of Class I sources conducted at the James Clerk Maxwell Telescope with SCUBA, the Submillimeter Continuum Users Bolometer Array. By combining our analysis of Class I sources with studies of earlier stages (i.e. pre-protostellar and Class I), we hope to test the proposed evolutionary sequence for low-mass star-forming cores (pre-protostellar-->Class III).

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